ALSTON&BIRD LLP The Atlantic Building 950 F Street, NW Washington, DC

ALSTON&BIRD LLP The Atlantic Building 950 F Street, NW Washington, DC 20004-1404 202-756-3300 Fax: 202-756-3333 Sean A. Atkins Direct Dial: 202-756-3072 Email: sean.atkins@alston.com October 1, 2010 The Honorable Kimberly D. Bose Secretary Federal Energy Regulatory Commission 888 First Street, NE Washington, DC 20426 Re: Calpine Corporation, et al. v. California Independent System Operator Corporation, Docket No. EL09-62-000 Settlement Agreement Dear Secretary Bose: Pursuant to Rule 602(b) of the Commission s Rules of Practice and Procedure, 18 C.F.R. 385.602 (2010), the California Independent System Operator Corporation, on behalf of itself and the other Settling Parties in the above-referenced proceeding, submits a Settlement Agreement in the proceeding. The background and terms of the Settlement Agreement are set forth in the attachments to this filing. Consistent with the Commission s regulations, the following documents are attached: Attachment A Attachment B Settlement Agreement Explanatory Statement

The Honorable Kimberly D. Bose October 1, 2010 Page 2 Two extra copies of this filing are also enclosed. Please stamp these copies with the date and time filed and return them to the messenger. Respectfully submitted, Nancy Saracino General Counsel Sidney M. Davies Assistant General Counsel California Independent System Operator Corporation 151 Blue Ravine Road Folsom, CA 95630 _/s/ Sean A. Atkins Sean A. Atkins Bradley R. Miliauskas Alston & Bird LLP The Atlantic Building 950 F Street, NW Washington, DC 20004 Counsel for the California Independent System Operator Corporation

UNITED STATES OF AMERICA BEFORE THE FEDERAL ENERGY REGULATORY COMMISSION Calpine Corporation, Citigroup Energy Inc., Dynegy Power Marketing Inc., J.P. Morgan Ventures Energy Corporation, BE CA, LLC, Mirant Energy Trading, LLC, NRG Energy, Inc., Powerex Corporation, and RRI Energy, Inc. v. Docket No. EL09-62-000 California Independent System Operator Corporation SETTLEMENT AGREEMENT This settlement agreement ( Settlement Agreement ) is entered into by and among all of the parties in the above-captioned proceeding that are listed in footnote 1 hereto (collectively, Settling Parties ), in order to resolve all issues in the abovecaptioned proceeding. 1 In addition, each party listed in footnote 2 hereto (collectively, Settlement Discussion Participants ), each of which is a party in this proceeding as of October 1, 2010, has authorized the ISO to state that each such Settlement Discussion Participant either supports or does not oppose the Settlement Agreement. 2 1 The Settling Parties are the California Independent System Operator Corporation ( ISO or CAISO ); Calpine Corporation; Citigroup Energy Inc.; Dynegy Power Marketing Inc.; J.P. Morgan Ventures Energy Corporation; BE CA, LLC; NRG Energy, Inc.; Powerex Corporation; RRI Energy, Inc.; Pacific Gas and Electric Company; San Diego Gas & Electric Company; Southern California Edison Company; and Morgan Stanley Capital Group Inc. 2 The Settlement Discussion Participants are the Cities of Anaheim, Azusa, Banning, Colton, Pasadena, and Riverside, California; the City of Santa Clara, doing business as Silicon Valley Power; the M-S-R Public Power Agency; The Metropolitan Water District of Southern California; the Modesto Irrigation District; Mirant Energy Trading, LLC; the Northern California Power Agency; the Transmission Agency of Northern California; the California Department of Water Resources State Water Project; Golden State Water Company; and Commission Trial Staff.

TERMS The terms of the Settlement Agreement are as follows: ARTICLE 1 DEFINITIONS 1.1 All defined terms in this Settlement Agreement will have the meanings set forth in the ISO s open access transmission tariff ( ISO Tariff ) as amended or supplemented from time to time, provided that such amendments or supplements shall not alter any rights or obligations set forth in the Settlement Agreement. ARTICLE 2 AGREEMENT OF THE SETTLING PARTIES AS TO ISSUES RAISED IN THIS PROCEEDING 2.1 All issues in this proceeding will be fully resolved by acceptance by the Federal Energy Regulatory Commission ( Commission ) of the proposed ISO Tariff provisions that are included in Attachment 1 to this Settlement Agreement ( Revised Default Allocation Tariff Provisions ). The Settling Parties request that the Commission issue an order in this proceeding accepting the Settlement Agreement without modification or condition and accepting the ISO s commitment under the terms and conditions of this Settlement Agreement to submit a compliance filing that contains the Revised Default Allocation Tariff Provisions. The ISO will submit a compliance filing to revise the ISO Tariff to incorporate the Revised Default Allocation Tariff Provisions within fifteen (15) calendar days after the Commission issues an order accepting the Settlement Agreement. 2.2 The Revised Default Allocation Tariff Provisions will go into effect as of the - 2 -

April 1, 2009 Trading Day (including Day-Ahead transactions on March 31, 2009), and will expire as of the fifth anniversary of the date the Commission issues an order accepting this Settlement Agreement, unless the effectiveness of the Revised Default Allocation Tariff Provisions is continued as described in Section 2.3 of this Settlement Agreement. 2.3 No later than six (6) months prior to the fifth anniversary of the date the Commission issues an order accepting this Settlement Agreement, the ISO will begin a stakeholder process to examine whether there is a need to modify or replace the Revised Default Allocation Tariff Provisions. Upon conclusion of the stakeholder process, and at least three (3) months prior to the fifth anniversary of the date the Commission issues an order accepting this Settlement Agreement, the ISO will make a filing with the Commission pursuant to Section 205 of the Federal Power Act ( FPA ) either to request that the effectiveness of the Revised Default Allocation Tariff Provisions be continued or to file amendments to modify or replace them. Nothing in this Settlement Agreement is intended to prejudge the ISO s FPA Section 205 filing required by this Section 2.3 or prejudice any party s rights regarding such filing. 2.4 No party in Docket No. EL09-62 as of October 1, 2010 may exercise any otherwise available rights under Section 206 of the FPA as to the Revised Default Allocation Tariff Provisions for a period of three (3) years from the date that the Commission issues an order accepting the Settlement Agreement, unless, market-wide, payment default amounts that cumulatively exceed thirty-five million dollars ($35,000,000) are allocated pursuant to the Revised Default Allocation Tariff Provisions, in which event all rights of the above-referenced parties under Section 206 of the FPA - 3 -

will be fully restored prospectively as of the day after the thirty-five million dollar threshold is exceeded. 2.5 The Settling Parties request that, as part of an order in this proceeding accepting the Settlement Agreement, the Commission accept the Non-Disclosure Certificate contained in Attachment 2 hereto ( NDC ). 2.5.1 Each party in Docket No. EL09-62 as of October 1, 2010 that has executed the NDC accepted by the Commission will be entitled to receive aggregate quarterly default loss allocation percentages by groupings determined by the ISO ( Aggregate Information ), for purposes of monitoring the settlement embodied in this Settlement Agreement. 2.5.1.1 The ISO will provide the Aggregate Information using groupings of market participants to be determined by the ISO with at least three members, such groupings at a minimum to include the following categories: investor-owned utilities, municipalities, suppliers, and marketers/importers. The ISO will provide to the parties in Docket No. EL09-62 as of October 1, 2010 that have executed the NDC accepted by the Commission its determination of which market participants are in each grouping. 2.5.1.2 On or about the first Business Day of the second quarter of 2011, the ISO will provide the Aggregate Information based on application of the allocation methodology set forth in Section 11.29.17.2 of the Revised Default Allocation Tariff Provisions to participation in the CAISO Markets for the most recent two (2) full calendar quarters preceding the first Business Day of that quarter for which T+38B data are available (i.e., the third and fourth quarters of 2010). - 4 -

2.5.1.3 On or about the first Business Day of the third quarter of 2011, the ISO will provide the Aggregate Information based on application of the allocation methodology set forth in Section 11.29.17.2 of the Revised Default Allocation Tariff Provisions to participation in the CAISO Markets for the most recent three (3) full calendar quarters preceding the first Business Day of that quarter for which T+38B data are available (i.e., the third and fourth quarters of 2010 and the first quarter of 2011). 2.5.1.4 On or about the first Business Day of the fourth quarter of 2011, and on or about the first Business Day of every subsequent quarter that this Settlement Agreement is in effect, the ISO will provide the Aggregate Information based on application of the allocation methodology set forth in Section 11.29.17.2 of the Revised Default Allocation Tariff Provisions to participation in the CAISO Markets for the most recent four (4) full calendar quarters preceding the first Business Day of that quarter for which T+38B data are available. 2.5.2 Nothing in this Section 2.5 is intended to preclude any party from obtaining this information in future proceedings through the discovery process. Should the stakeholder Credit Working Group formed in accordance with Section 2.6 of this Settlement Agreement recommend, after stakeholder input, that Aggregate Information subject to the NDC should be released by the ISO in any form in any public forum, the ISO must first obtain approval of the CAISO Governing Board for such disclosure. Once the CAISO Governing Board has approved such disclosure, the ISO will be authorized to release Aggregate Information subject to the NDC in a public forum without modification to the NDC or the Settlement Agreement. - 5 -

2.6 The ISO will organize a stakeholder working group within ninety (90) days of a Commission order approving the Settlement Agreement that will meet at least quarterly to consider enhancements to the ISO s credit practices ( Credit Working Group ), including additional credit risk data to be included in the periodic public reports on credit issues to the CAISO Governing Board. 2.7 Following issuance by the Commission of an order approving this Settlement Agreement, the Settling Parties will take all actions reasonably necessary to effectuate the Settlement Agreement. ARTICLE 3 EFFECTIVE DATE 3.1 This Settlement Agreement will become effective upon issuance by the Commission of an order approving this Settlement Agreement without modification or condition, or, if modified or conditioned, upon its acceptance as so modified by the Settling Parties and the Settlement Discussion Participants as provided in Section 4.1 below. ARTICLE 4 MISCELLANEOUS 4.1 Termination of Settlement Agreement. If the Commission, in approving this Settlement Agreement or by taking any other regulatory action, modifies the Settlement Agreement in a manner that materially changes the benefits and burdens negotiated herein, the Settling Parties and the Settlement Discussion Participants will meet and confer within thirty (30) days as to whether all Settling Parties and Settlement - 6 -

Discussion Participants can support or not oppose a modified Settlement Agreement. If all of the Settling Parties and Settlement Discussion Participants do not agree to support or not oppose a modified Settlement Agreement within sixty (60) days of a Commission order materially changing the Settlement Agreement, then the Settlement Agreement will terminate. 4.2 Precedential Value. Except as explicitly set forth herein, no one will be deemed to have approved, accepted, agreed to, or consented to any principle or position in this proceeding, or to have prejudiced positions taken or that may be taken in this or any other proceedings. This Settlement Agreement will have no precedential value, will not be cited as precedent, and will not be deemed to bind any entity (except as otherwise expressly provided for herein) in any proceeding, including any Commission proceeding, except in any proceeding to enforce this Settlement Agreement. This Settlement Agreement will not be deemed to be a settled practice as that term was interpreted and applied in Public Service Commission of the State of New York v. FERC, 642 F.2d 1335 (D.C. Cir. 1980). 4.3 Negotiated Settlement Agreement. This Settlement Agreement is made upon the express understanding that it constitutes a negotiated settlement agreement and, except as otherwise expressly provided for herein, no one will be deemed to have approved, accepted, agreed to, or consented to any principle or policy relating to the rates, charges, classifications, terms, conditions, principles, issues, or tariff sheets associated with this Settlement Agreement. 4.4 Integration. The Attachments to this Settlement Agreement are hereby - 7 -

integrated into, and will constitute part of, this Settlement Agreement. 4.5 Entire Agreement. This Settlement Agreement, including the Attachments hereto, constitutes the full and complete agreement of the Settling Parties with respect to the subject matter addressed herein and supersedes all prior negotiations, understandings, and agreements, whether written or oral, between the Settling Parties with respect to the subject matter addressed herein. 4.6 Standard of Review. This Settlement Agreement will be subject to the just and reasonable standard of review. 4.7 Settlement Privilege. All discussions among the parties relating to this Settlement Agreement have been conducted on the explicit understanding that they were undertaken subject to Rule 602(e) of the Commission s Rules of Practice and Procedure, 18 C.F.R. 385.602(e). All offers of settlement, and any comments on such offers, and any discussions among the parties in Docket No. EL09-62 with respect to this Settlement Agreement are privileged, are not admissible as evidence against any party who objects to their admission, and are not subject to discovery. 4.8 Support for Settlement Agreement/No Waiver of Rights. The Settling Parties will support this Settlement Agreement and will cooperate in securing Commission acceptance and implementation of this Settlement Agreement and the ISO compliance filing to be submitted pursuant to Section 2.1 of this Settlement Agreement. The Settling Parties hereby waive any and all rights to seek rehearing or judicial review of any Commission order(s) approving the Settlement Agreement or the compliance filing without modification or condition; provided, however, that if the Commission - 8 -

approves the Settlement Agreement or the compliance filing with modifications or conditions, any party in Docket No. EL09-62 as of October 1, 2010 may seek rehearing or judicial review of the Commission order(s) approving the Settlement Agreement or the compliance filing solely to challenge the Commission s imposition of such modifications or conditions in order to preserve the terms and conditions of the Settlement Agreement or the compliance filing as filed. Except as set forth in Section 2.4 of this Settlement Agreement, no party waives its rights under Section 205 or 206 of the FPA with respect to any provision of the ISO Tariff. 4.9 Headings. Headings in this Settlement Agreement are included for convenience only and are not intended to have any significance in interpretation of this Settlement Agreement. Tariff. 4.10 Dispute Resolution. Dispute resolution will be in accordance with the ISO - 9 -

11.29 Billing and Payment Process. * * * 11.29.9.6.2.1 Replenishing the CAISO Reserve Account Following Payment Default. If the CAISO has debited the CAISO Reserve Account then: (a) If, after the CAISO has debited the CAISO Reserve Account on a Payment Date, the CAISO Bank receives a remittance from a CAISO Debtor which has not been (but should have been, if it had been received on a timely basis) credited to the CAISO Clearing Account by 10:00 am on the Payment Date and which required the debiting of the CAISO Reserve Account, such remittance shall be credited to the CAISO Reserve Account. (b) The proceeds of any enforcement of Financial Security and/or amounts recovered under proceedings shall be credited to the CAISO Reserve Account. (c) If, after taking reasonable action, the CAISO determines that the default amount (or any part) and/or Interest cannot be recovered on the next practicable Invoices, such amounts shall be allocated in accordance with Section 11.29.17 of the CAISO Tariff.deemed to be owing by those Market Participants who were CAISO Creditors on the relevant Payment Date pro rata to the net payments they received on that Payment Date and shall be accounted for by way of a charge in the next Settlement Statements of those CAISO Creditors. Such charge shall be credited to the CAISO Reserve Account. * * * 11.29.10.3 Other Invoicing Provisions. The Invoices or Payment Advices will also include the total charges for each component of the Grid Management Charge, the total charges associated with any Interest for each relevant Trading Month, the FERC Annual Charges due monthly, as well as any disbursements associated with a shortfall receipt distribution.

A separate Invoice for the FERC Annual Charges due annually will be issued by the CAISO to the Scheduling Coordinator in accordance with Section 11.19.1.2. The CAISO will issue separate Invoices for NERC/WECC Charges as described in Section 11.20. A separate Invoice for a shortfall allocation will be issued by the CAISO to Scheduling Coordinators in the event of a payment default in accordance with Section 11.29.17.1. In the event of an allocation of a payment default in accordance with Section 11.29.17.2, the CAISO may either issue separate Invoices to Default-Invoiced SCIDs pursuant to Section 11.29.17.2.1 or to SCIDs pursuant to Section 11.29.17.2.2, as applicable, or may issue Invoices through its standard invoicing process that include the allocation of the payment default. Recalculation Settlement Statements, post closing adjustments and the financial outcomes of CAISO ADR Procedures and any other dispute resolution may be invoiced separately from monthly market activities. The CAISO shall provide a Market Notice at least five (5) Business Days prior to such invoicing identifying the components of such Invoice or Payment Advice. * * * 11.29.13 Non-payment by a Scheduling Coordinator or CRR Holder. 11.29.13.1 Notification and Interest. If a Scheduling Coordinator or CRR Holder becomes aware that a payment for which it is responsible will not be remitted to the CAISO Clearing Account on time, it shall immediately notify the CAISO of the fact and the reason for the non-payment. If the Scheduling Coordinator or CRR Holder fails to pay any sum to the CAISO when due and after and the CAISO draws upon any and all available Financial Security provided by the defaulting Scheduling Coordinator or CRR Holder, the Scheduling Coordinator or CRR Holder shall pay Interest on the overdue amount for the period from the Payment Date to the date on which the payment is remitted to the CAISO Clearing Account, together with any related transaction costs incurred by the CAISO. The CAISO shall apply all such Interest payments on the default amount either on a pro rata basis to CAISO Creditors in relation to amounts past due in the order of the creation of such debts, or, if the default amount was allocated pursuant to Section 11.29.17.2, to Default-Invoiced SCIDs in proportion to their allocated shares of the default amount as calculated pursuant to Section 2

11.29.17.2.1 or to SCIDs in proportion to their allocated shares of the default amount as calculated pursuant to Section 11.29.17.2.2, as applicable, in relation to amounts past due in the order of the creation of such debts. * * * 11.29.13.10 Application of Funds Received Amounts credited to the CAISO Clearing Account in payment of a default amount (as set out in Section 11.29.9.6.2.1 and 11.29.9.6.4.1) or as a result of enforcing the defaulting CAISO Debtor s Financial Security shall be applied to the CAISO Reserve Account pursuant to Section 11.29.9.6.2.1 or to the CAISO Penalty Reserve Account pursuant to Section 11.29.9.6.4.1 to reduce amounts outstanding under any CAISO banking facilities used to fund the CAISO Reserve Account or the CAISO Penalty Reserve Account on the relevant Payment Date less any amounts that firstand the balance (if any) shall be applied either to reimburse pro rata any CAISO Creditors whose payments were reduced pursuant to Section 11.29.17.1, or, if the default amount was allocated pursuant to Section 11.29.17.2, to reimburse Default-Invoiced SCIDs in proportion to their allocated shares of the default amount as calculated pursuant to Section 11.29.17.2.1 or to reimburse SCIDs in proportion to their allocated shares of the default amount as calculated pursuant to Section 11.29.17.2.2, as applicable. * * * 11.29.17 Alternative Payment Procedures. 11.29.17.1 Pro Rata Reduction to Payments. If it is not possible to clear the CAISO Clearing Account on a Payment Date because of an insufficiency of funds available in the CAISO Reserve Account or by enforcing any Financial Security provided by a defaulting Scheduling Coordinator or CRR Holder, the CAISO shall (1) first pay in full every CAISO Creditor whose net amounts receivable on the relevant Payment Date is less than $5,000; and (2) second, reduce payments to all remaining CAISO Creditors proportionately to the net amounts payable to them on the relevant Payment Date to the extent necessary to clear the CAISO Clearing Account through a shortfall allocation. The CAISO shall account for such reduction in the CAISO ledger accounts as amounts due and owing by the non- 3

paying CAISO Debtor to each CAISO Creditor whose payment was so reduced. Each payment default amount allocated to CAISO Creditors through a shortfall allocation under this Section 11.29.17.1 that remains unpaid by the defaulting Scheduling Coordinator or CRR Holder will be allocated as set forth in Section 11.29.17.2. The provisions of this ssection 11.29.17.1 shall not apply to non-payment of any penalty amount that a Scheduling Coordinator or CRR Holder has disputed and FERC has specifically authorized the Scheduling Coordinator or CRR Holder to net its payment to the CAISO by the amount of the penalty in question in accordance with Section 37.9.3, in which case the non-payment amount will be allocated exclusively to the CAISO penalty trust account and not allocated to CAISO Creditors. 11.29.17.2 Payment Default Allocation 11.29.17.2.1 Methodology for Allocating Payment Default Amounts Except as set forth in Section 11.29.17.2.2, each payment default amount allocated to CAISO Creditors through a shortfall allocation pursuant to Section 11.29.17.1 and that remains unpaid by the defaulting Scheduling Coordinator or CRR Holder will be allocated on the next practicable Invoices to the Default-Invoiced SCIDs to which the percentage shares calculated pursuant to Section 11.29.17.2.7 for the current calendar quarter apply, excluding the CAISO Debtor that has not paid the payment default amount, pursuant to the following methodology: (a) Twenty (20) percent of the payment default amount will be allocated to the Default-Invoiced SCIDs in proportion to the net amounts that were payable in each applicable calendar quarter (and averaged within such calendar quarter) to the Default-Invoiced SCIDs over the applicable Default Look-Back Periods. For Market Participants subject to Default Election option 1, these net amounts will be calculated on an SCID-by-SCID basis. For Market Participants that are eligible for and have chosen Default Election option 2, these net amounts will be calculated by consolidating all of the data for the applicable SCIDs, recognizing any offsetting effect of an individual SCID s positive or negative dollar amount in the consolidated total. 4

(b) Thirty (30) percent of the payment default amount will be allocated to the Default- Invoiced SCIDs in proportion to the sum of the absolute values of the dollar amounts shown on their Invoices payable or receivable in each applicable calendar quarter (and averaged within such calendar quarter) over the applicable Default Look-Back Periods, after excluding dollar amounts shown on the Invoices for payments and charges for GMC, RMR, and Wheeling Access Charge costs, and after excluding the billing of Access Charges and the payment of Transmission Revenue Requirements to Participating Transmission Owners. For Market Participants subject to Default Election option 1, the sum of the absolute values of the dollar amounts shown on their Invoices payable or receivable in each applicable calendar quarter will be calculated on an SCID-by-SCID basis. For Market Participants that are eligible for and have chosen Default Election option 2, the absolute values of the net sum of the dollar amounts shown on their Invoices payable or receivable in each applicable calendar quarter will be calculated by consolidating all of the data for the applicable SCIDs, recognizing any offsetting effect of an individual SCID s positive or negative dollar amount in the consolidated total. (c) Fifty (50) percent of the payment default amount will be allocated to the Default- Invoiced SCIDs in proportion to the largest of the following five (5) amounts calculated in MWh for every month in each applicable calendar quarter (and averaged within such calendar quarter) for each Default-Invoiced SCID over the applicable Default Look-Back Periods: (1) Cleared Day-Ahead Schedules to supply Energy, plus Day-Ahead Ancillary Services Awards and qualified Self-Provided Ancillary Services, plus scheduled supply obligation for Ancillary Services (including imports but excluding RUC Schedules), plus Virtual Supply Awards; (2) Metered Generation, plus Real-Time Interchange Import Schedules, plus Real-Time Ancillary Services Awards and qualified Self-Provided 5

Ancillary Services, plus HASP Ancillary Services Awards and qualified Self-Provided Ancillary Services, plus Real-Time supply obligation for Ancillary Services; (3) Cleared Day-Ahead Schedules for Demand (including Demand served by Pumped-Storage Hydro Units and exports) multiplied by one-hundred three (103) percent to reflect Transmission Losses, plus scheduled demand obligation for Ancillary Services, plus Virtual Demand Awards; (4) Metered Load multiplied by one-hundred three (103) percent to reflect Transmission Losses, plus Real-Time Interchange Export Schedules, plus Real-Time demand obligation for Ancillary Services; or (5) The greater of (A) the quantity of CRRs acquired in CRR Auctions or transferred through the Secondary Registration System (excluding CRRs acquired in CRR Allocations) or (B) Inter-SC Trades of Energy. For Market Participants subject to Default Election option 1, each of the five (5) amounts calculated in MWh for every month in each applicable calendar quarter (and averaged within such calendar quarter) will be calculated on an SCID-by- SCID basis. For Market Participants that are eligible for and have chosen Default Election option 2, each of the five (5) amounts calculated in MWh for every month in each applicable calendar quarter (and averaged within such calendar quarter) will be calculated by consolidating all of the data for the applicable SCIDs. 11.29.17.2.2 Interim De Minimis Allocation During the time period from the effective date of this Section 11.29.17.2.2 until April 1, 2011, each payment default amount allocated to CAISO Creditors through a shortfall allocation pursuant to Section 11.29.17.1 that is equal to or less than $1,000 multiplied by the total number of SCIDs that have recorded market activity in the most recent Trading Month will be allocated on the next practicable Invoices among all such SCIDs so that an equal share of the payment default amount is allocated to each applicable SCID excluding the CAISO Debtor that has not paid the payment 6

default amount. Notwithstanding the foregoing, if allocation of a payment default amount to any SCID under this Section 11.29.17.2.2 would result in any entity: (i) being allocated more than a $1,000 share of a payment default amount per applicable SCID or (ii) being allocated cumulative shares of payment default amounts that equal more than $1,000 per applicable SCID, the CAISO will instead allocate the payment default amount pursuant to Section 11.29.17.2.1. 11.29.17.2.3 Interest on Allocated Payment Default Amounts In accordance with Section 11.29.10.2, Interest will be charged to Default-Invoiced SCIDs pursuant to Section 11.29.17.2.1 or to SCIDs pursuant to Section 11.29.17.2.2 to the extent the payment default amounts allocated to those Default-Invoiced SCIDs or SCIDs exceed the payment default amounts allocated to them through a shortfall allocation pursuant to Section 11.29.17.1, and Interest will be paid to Default-Invoiced SCIDs pursuant to Section 11.29.17.2.1 or to SCIDs pursuant to Section 11.29.17.2.2 to the extent the payment default amounts allocated to those Default-Invoiced SCIDs or SCIDs are exceeded by the payment default amounts allocated to them through a shortfall allocation pursuant to Section 11.29.17.1, for the period between the date of the shortfall allocation and the date payments are due for the Invoices on which the allocation of the payment default amounts appear. The Interest payable pursuant to this Section 11.29.17.2.3 will be included on the Invoices on which the allocation of the payment default amounts appear. 11.29.17.2.4 Default Election (a) Each Market Participant that is a Scheduling Coordinator, a CRR Holder, a Candidate CRR Holder, or a PTO will make an election of either option 1 or option 2 under this Section 11.29.17.2.4, which will be the Market Participant s Default Election until such time as a subsequent change by the Market Participant of its Default Election from option 1 to option 2 (or vice versa) goes into effect. Each Market Participant that is a Scheduling Coordinator, a CRR Holder, a Candidate CRR Holder, or a PTO shall make only a single Default Election regardless of whether that Market Participant has multiple effective contracts with the CAISO that cause the entity to be a Market Participant. For 7

example, an entity that has signed a Scheduling Coordinator Agreement and a CRR Entity Agreement shall only make a single Default Election. (i) Option 1: For such Market Participants that choose Default Election option 1, the methodology for allocating payment default amounts set forth in Section 11.29.17.2.1 will apply to each SCID of such Market Participant on an SCID-by-SCID basis, and each SCID of such Market Participant will be a Default-Invoiced SCID. (ii) Option 2: In order to qualify for Default Election option 2, all of the SCIDs of a Market Participant with one or more effective contracts with the CAISO must certify that they meet one of the following criteria, and the entity must agree that the methodology for allocating payment default amounts set forth in Section 11.29.17.2.1 will apply to all SCIDs created for use under all of the effective contracts with the CAISO based on a consolidation of data for all such SCIDs: (1) All of the SCIDs are associated with Affiliates or business units under common control where one or more of the Affiliates or business units or a related business entity has more than fifty (50) percent control of the Affiliates or business units, either directly or through one or more intermediaries; (2) All of the SCIDs are associated with a Joint Powers Authority; or (3) All of the SCIDs are associated with a municipal utility or state or federal agency. Each Market Participant that chooses Default Election option 2 will at the same time select a single SCID to be the sole Default-Invoiced SCID under option 2. This Default-Invoiced SCID will receive Invoices containing payment default amounts allocated on behalf of all of the SCIDs under all contracts between the entity and the CAISO. Allocation of payment default amounts for entities choosing Default Election option 8

2 will be based on consolidated data from all of the entity s SCIDs. The selection of a single SCID as the sole Default-Invoiced SCID will not in any way relieve any Market Participant subject to Default Election option 2 of any obligation to pay Invoices, including in the event of a default by the Default-Invoiced SCID on a default payment obligation, in which case the CAISO will be entitled to utilize all available Financial Security provided by any defaulting Market Participant subject to Default Election option 2. (b) By October 15, 2010, Market Participants will inform the CAISO in writing of their initial Default Elections for the period from March 31, 2009 through December 31, 2011. Within five (5) Business Days after FERC issues an order accepting the settlement agreement filed in FERC Docket No. EL09-62, Market Participants will inform the CAISO in writing of any changes to their initial Default Elections for the period from March 31, 2009 through December 31, 2011. If Market Participants that have made initial Default Elections fail to timely inform the CAISO in writing of changes to their initial Default Elections, the Market Participants will be deemed to have chosen their initial Default Elections as their Default Elections for the period from March 31, 2009 through December 31, 2011. (c) Starting on October 1, 2011, Market Participants may subsequently change their Default Elections by October 1 of each calendar year by notifying the CAISO, to become effective on January 1 of the next calendar year. Market Participants that do not change their Default Elections by that date will be deemed to have chosen to continue their current Default Elections. (d) Each entity that becomes a Scheduling Coordinator, a CRR Holder, a Candidate CRR Holder, or a PTO after one of the dates set forth in Section 11.29.17.2.4(a), -(b), or -(c) will make its Default Election prior to engaging in any transactions in the CAISO Markets. The Default Election of each such entity will remain in effect until the entity makes another Default Election pursuant to this Section 9

11.29.17.2.4. However, any Market Participant that has already made a Default Election will not be eligible to change its Default Election as a result of its subsequently also becoming a Scheduling Coordinator, a CRR Holder, a Candidate CRR Holder, or a PTO. (e) Market Participants that do not timely inform the CAISO of their initial Default Elections will be deemed to have chosen Default Election option 1. 11.29.17.2.5 Effect of Change in Default Election Starting with the Default Elections due by October 1, 2011, each time that a Market Participant changes its Default Election pursuant to Section 11.29.17.2.4 from option 1 to option 2 (or vice versa), the following provisions will apply: (a) For the first quarter of the calendar year after the change in Default Election goes into effect, the Default-Invoiced SCID(s) will be allocated shares of payment default amounts calculated pursuant to Section 11.29.17.2.1 based on application of the prior election to the first three (3) full calendar quarters of data within the Default Look-Back Period and application of the new election to the most recent full calendar quarter of data within the Default Look-Back Period. (b) For the second quarter of the calendar year after the change in Default Election goes into effect, the Default-Invoiced SCID(s) will be allocated shares of payment default amounts calculated pursuant to Section 11.29.17.2.1 based on application of the prior election to the first two (2) full calendar quarters of data within the Default Look-Back Period and application of the new election to the most recent two (2) full calendar quarters of data within the Default Look-Back Period. (c) For the third quarter of the calendar year after the change in Default Election goes into effect, the new Default-Invoiced SCID(s) will be allocated shares of payment default amounts calculated pursuant to Section 11.29.17.2.1 based on application of the prior election to the first full calendar quarter of data within the 10

Default Look-Back Period and application of the new election to the most recent three (3) full calendar quarters of data within the Default Look-Back Period. (d) For the fourth quarter of the calendar year after the change in Default Election goes into effect, the Default-Invoiced SCID(s) will be allocated shares of payment default amounts calculated pursuant to Section 11.29.17.2.1 based on application of the new election to the entire Default Look-Back Period. 11.29.17.2.6 Default Look-Back Period (a) For each payment default that occurs anytime prior to March 31, 2011, the Default Look-Back Period will be the most recent two (2) full calendar quarters for which T+38B data are available. In no event will the CAISO consider settlement data for transactions occurring prior to March 31, 2009. (b) For each payment default that occurs in the second calendar quarter of 2011, the Default Look-Back Period will be the most recent two (2) full calendar quarters for which T+38B data are available (i.e., the third and fourth calendar quarters of 2010). (c) For each payment default that occurs in the third calendar quarter of 2011, the Default Look-Back Period will be the most recent three (3) full calendar quarters for which T+38B data are available (i.e., the third and fourth calendar quarters of 2010 and the first calendar quarter of 2011). (d) For each payment default that occurs in the fourth calendar quarter of 2011 or in any subsequent calendar quarter in which Section 11.29.17.2.1 is in effect, the Default Look-Back Period will be the most recent four (4) full calendar quarters for which T+38B data are available. (e) Notwithstanding any other provision in this Section 11.29.17.2.6, the following provisions will apply to each Default-Invoiced SCID for an entity that is a new Market Participant that begins to participate in the CAISO Markets following the effective date of this Section 11.29.17.2.6: 11

(i) The Default-Invoiced SCID for that Market Participant will first be subject to allocation of payment default amounts under Section 11.29.17.2.1 in the second calendar quarter following the calendar quarter in which the Market Participant begins to participate in the CAISO Markets and the applicable Default Look-Back Period will be the calendar quarter in which the Market Participant began to participate in the CAISO Markets. (ii) For each payment default that occurs in the third calendar quarter following the calendar quarter in which the Market Participant begins to participate in the CAISO Markets, the applicable Default Look-Back Period will be the Market Participant s first two (2) calendar quarters of participation in the CAISO Markets. (iii) For each payment default that occurs in the fourth calendar quarter following the calendar quarter in which the Market Participant begins to participate in the CAISO Markets, the applicable Default Look-Back Period will be the Market Participant s first three (3) calendar quarters of participation in the CAISO Markets. (iv) For each payment default that occurs in any subsequent calendar quarter in which Section 11.29.17.2.1 is in effect, the applicable Default Look-Back Period will be determined as set forth in Section 11.29.17.2.6(d). 11.29.17.2.7 Provision of Information on Percentage Shares Beginning with the second calendar quarter of 2011, the CAISO will provide to each Default- Invoiced SCID on or about the first Business Day of the applicable calendar quarter its own percentage share of any payment default amount that may be allocated in the calendar quarter to which the percentage share applies, subject to adjustment to account for any non-paying CAISO Debtor, based on application of the methodology for allocating payment default amounts set forth in Section 11.29.17.2.1 to the applicable Default Look-Back Period. In calculating the percentage share for each Default-Invoiced SCID pursuant to this Section 11.29.17.2.7, the CAISO will 12

determine the percentage share for each full calendar quarter and will average those quarterly percentage shares. 11.29.17.2.8 Scope of Payment Default Allocation Provisions The provisions of Section 11.29.17.2 will not apply to the allocation of payment default amounts and interest accrued thereon that are associated with Trading Days that occurred prior to April 1, 2009. 11.29.17.32 Payment of Defaulted Receivables. Collections of defaulted receivables (other than Interest) will either be distributed pro rata to CAISO Creditors for the month of default or, if the defaulted receivables are allocated pursuant to Section 11.29.17.2, collections of the defaulted receivables will be distributed to Default-Invoiced SCIDs in proportion to their allocated shares of the defaulted receivables as calculated pursuant to Section 11.29.17.2.1 or to SCIDs in proportion to their allocated shares of the defaulted receivables as calculated pursuant to Section 11.29.17.2.2, as applicable, for the month in which the payment default occurred. (1) If the total collected in that closing related to the past due Trading Month is less than $5,000, then the funds shall accumulate in an interest-bearing account until either: (a) the account exceeds $5,000, (b) there have been no distributions from the account for six months, or (c) all defaults for that month have been collected exclusive of any bankruptcy defaults. (2) If all CAISO Creditors for that Trading Month have been paid, then the proceeds will either be paid pro rata to the CAISO Creditors in the oldest unpaid Trading Month, or, if the defaulted receivables are allocated pursuant to Section 11.29.17.2, the proceeds will be paid to the Default-Invoiced SCIDs in proportion to their allocated shares of the default amount, as calculated pursuant to Section 11.29.17.2.1 or will be paid to the SCIDs in proportion to their allocated shares of the default amount as calculated pursuant to Section 11.29.17.2.2, as applicable, in the oldest unpaid Trading Month. 13

(3) This provision is also applicable to the amounts netted against CAISO Creditor balances related to prior defaulted receivables. (4) All defaulted receivables disbursed under this Section shall be disbursed in accordance with the timeframes set forth in Section 11.29.9.6.1. * * * 13.5.3.2 Residual Amounts. Any awards for which the CAISO is unable to identify Market Participants in accordance with 13.5.3.1 and any award amounts that the CAISO is unable to collect that are not covered by Section 11.29.17.1 or Section 11.29.17.2 will be allocated to all Scheduling Coordinators through neutrality adjustments. * * * CAISO Tariff Appendix A Master Definitions Supplement * * * Default Election An election made pursuant to Section 11.29.17.2.4. * * * Default-Invoiced SCID(s) The SCID(s) selected by an entity pursuant to the Default Election procedures set forth in Section 11.29.17.2.4 that are to be allocated a portion of any payment default amount pursuant to Section 11.29.17.2.1. * * * Default Look-Back Period The retrospective time period determined pursuant to Section 11.29.17.2.6 for the purpose of allocating payment default amounts. * * * Real-Time Interchange Import Schedule A final agreed-upon schedule of Energy to be transferred to the CAISO Balancing Authority Area from another Balancing Authority Area based on agreed-upon size (megawatts), start and end time, beginning and ending 14

ramp times and rate, and type required for delivery and receipt of power and Energy between the source and sink Balancing Authority Areas involved in the transaction. 15

UNITED STATES OF AMERICA FEDERAL ENERGY REGULATORY COMMISSION Calpine Corporation, Citigroup Energy Inc., Dynegy Power Marketing Inc., J.P. Morgan Ventures Energy Corporation, BE CA, LLC, Mirant Energy Trading, LLC, NRG Energy, Inc., Powerex Corporation, and RRI Energy, Inc. v. Docket No. EL09-62-000 California Independent System Operator Corporation PROTECTIVE ORDER (Issued ) 1. This Protective Order shall govern the use of all Protected Materials provided by the California Independent System Operator Corporation ( ISO ) to any Participant in accordance with Section 2.5 of the Settlement Agreement filed in the above-referenced docket on October 1, 2010. This Protective Order shall be in effect from the effective date of the Settlement Agreement and shall remain in effect unless the Settlement Agreement terminates or until specifically modified or terminated by the Chief Administrative Law Judge or the Federal Energy Regulatory Commission (Commission). 2. This Protective Order applies to Protected Materials provided to any Participant in accordance with terms of Section 2.5 of the Settlement Agreement, which are provided for purposes of monitoring the settlement embodied in the Settlement Agreement. 3. Definitions -- For purposes of this Order: (a) The term "Participant" shall mean a Participant as defined in 18 CFR 385.102(b) with the additional limitation, consistent with the Settlement Agreement, that Participants who are parties shall be limited to those who are parties as of October 1, 2010. (b) (1) The term "Protected Materials" means the (i) aggregate quarterly default loss allocation percentages by groupings to be provided by the ISO to Participants on or about the first Business Day of each calendar quarter beginning with the second quarter of 2011, as described in Section 2.5.1 of the Settlement Agreement, and (ii) the ISO s

Docket No. EL09-62-000 2 determination of which market participants are in each grouping, as described in Section 2.5.1.1 of the Settlement Agreement. (2) The term "Notes of Protected Materials" means memoranda, handwritten notes, or any other form of information (including electronic form) which copies or discloses materials described in Paragraph 3(b)(1). Notes of Protected Materials are subject to the same restrictions provided in this order for Protected Materials except as specifically provided in this order. (3) Protected Materials shall not include (A) any information or document that has been filed with and accepted into the public files of the Commission, or contained in the public files of any other federal or state agency, or any federal or state court, unless the information or document has been determined to be protected by such agency or court, or (B) information that is public knowledge, or which becomes public knowledge, other than through disclosure in violation of this Protective Order, or (C) any information or document labeled as "Non-Internet Public" by a Participant, in accordance with Paragraph 30 of FERC Order No. 630, FERC Stats. & Regs. 31,140. Protected Materials do include any information or document contained in the files of the Commission that has been designated as Critical Energy Infrastructure Information. (c) The term "Non-Disclosure Certificate" shall mean the certificate annexed hereto by which Participants who have been granted access to Protected Materials shall certify their understanding that such access to Protected Materials is provided pursuant to the terms and restrictions of this Protective Order, and that such Participants have read the Protective Order and agree to be bound by it. All Non-Disclosure Certificates shall be served on all parties on the official service list maintained by the Secretary in this proceeding. (d) The term "Reviewing Representative" shall mean a person who has signed a Non-Disclosure Certificate and who is: (1) Commission Trial Staff designated as such in this proceeding; (2) an attorney who has made an appearance in this proceeding for a Participant; (3) attorneys, paralegals, and other employees associated for purposes of this case with an attorney described in Subparagraph (2); (4) a person designated as a Reviewing Representative by order of the Chief Administrative Law Judge or the Commission; or

Docket No. EL09-62-000 3 (5) employees or other representatives of Participants with significant responsibility for monitoring the settlement embodied in the Settlement Agreement. 4. Protected Materials shall be made available under the terms of this Protective Order only to Participants and only through their Reviewing Representatives as provided in Paragraphs 7-9. 5. Protected Materials shall remain available to Participants pursuant to the terms of the Settlement Agreement. To the extent Protected Materials are not returned or destroyed, they shall remain subject to the Protective Order. 6. All Protected Materials shall be maintained by the Participant in a secure place. Access to those materials shall be limited to those Reviewing Representatives specifically authorized pursuant to Paragraphs 8-9. The Secretary shall place any Protected Materials filed with the Commission in a non-public file. By placing such documents in a non-public file, the Commission is not making a determination of any claim of privilege. The Commission retains the right to make determinations regarding any claim of privilege and the discretion to release information necessary to carry out its jurisdictional responsibilities. For documents submitted to Commission Trial Staff ("Staff"), Staff shall follow the notification procedures of 18 CFR 388.112 before making public any Protected Materials. 7. Protected Materials shall be treated as confidential by each Participant and by the Reviewing Representative in accordance with the certificate executed pursuant to Paragraph 9. Protected Materials shall not be used except as necessary for monitoring the settlement embodied in the Settlement Agreement, nor shall they be disclosed in any manner to any person except a Reviewing Representative who is engaged in the conduct of this proceeding and who needs to know the information in order to carry out that person's responsibilities in this proceeding. Reviewing Representatives may make copies of Protected Materials, but such copies become Protected Materials. Reviewing Representatives may make notes of Protected Materials, which shall be treated as Notes of Protected Materials if they disclose the contents of Protected Materials. 8. (a) If a Reviewing Representative's scope of employment includes the marketing of energy, the direct supervision of any employee or employees whose duties include the marketing of energy, the provision of consulting services to any person whose duties include the marketing of energy, or the direct supervision of any employee or employees whose duties include the marketing of energy, such